HYDECO project - connection-disconnection-reconnection and visibility/invisibility aspects in the Umiujaq watershed
National audience Since its establishment at the mouth of the Umiujaq River in 1984, the village of the same name has developed, and notable features of socio-environmental evolution have become apparent. After a characterization of the hydrological system on the basis of photo-interpretation of aer...
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ftunivbrest:oai:HAL:hal-04642195v1 2024-09-15T18:39:06+00:00 HYDECO project - connection-disconnection-reconnection and visibility/invisibility aspects in the Umiujaq watershed Bhiry, Najat Rollet, Anne-Julia Decaulne, Armelle Université Laval Québec (ULaval) Université de Rennes 2 (UR2) Littoral, Environnement, Télédétection, Géomatique (LETG - Rennes ) Université de Brest (UBO)-Université de Rennes 2 (UR2)-Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG) Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (Nantes Univ - IGARUN) Nantes Université - pôle Humanités Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Humanités Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (Nantes Univ - IGARUN) Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ) Littoral, Environnement, Télédétection, Géomatique (LETG - Nantes ) Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG) ANR-11-LABX-0010,DRIIHM / IRDHEI,Dispositif de recherche interdisciplinaire sur les Interactions Hommes-Milieux(2011) Montréal, Canada 2022-11-24 https://hal.science/hal-04642195 en eng HAL CCSD hal-04642195 https://hal.science/hal-04642195 Séminaire annuel de l’OHMI Nunavik https://hal.science/hal-04642195 Séminaire annuel de l’OHMI Nunavik, Nov 2022, Montréal, Canada OHMi Nunavik [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2022 ftunivbrest 2024-08-26T14:13:01Z National audience Since its establishment at the mouth of the Umiujaq River in 1984, the village of the same name has developed, and notable features of socio-environmental evolution have become apparent. After a characterization of the hydrological system on the basis of photo-interpretation of aerial views and satellite images (via GoogleEarth), environmental changes on the whole watershed appear. First of all, thermokarst processes, which, without being quantitatively evaluated in terms of water and sediment flows, release both mineral suspended matter and organic matter into the surface waters, via a partially underground circulation. Vegetation cover has also changed significantly since 1984, with vegetated area increasing clearly since that date. The filtering role of the vegetation on sediment transfers is likely, limiting the possibilities of direct connection from the slopes on either side of the main bed. However, an example of a landslide, seasonally activated since at least 2013, highlights the potential connection between the slopes and the stream. The summer field season allowed for in situ characterization of the different compartments of the watershed, and qualification of the stream bottom in the downstream segment. The question arises, however, whether the stream has the competence for bottom transport, or whether it flows over inheritances. Depuis la sédentarisation de la population à l’embouchure de la rivière d’Umiujaq, dans le village du même nom qui s’est développé depuis 1984, des traits notoires d’évolution socio-environnementaux sont apparus clairement. Après une caractérisation du système hydrologique sur la base de photo-interprétation de vues aériennes et images satellitaires (via GoogleEarth), des changements environnementaux sur l’ensemble du bassin-versant apparaissent. Il s’agit d’abord de processus thermokarstiques qui, sans que cela soit encore quantitativement évalué en termes de flux hydrique et sédimentaire, relâchent à la fois des matières en suspension et de la matière ... Conference Object Thermokarst Umiujaq Nunavik Université de Bretagne Occidentale: HAL |
institution |
Open Polar |
collection |
Université de Bretagne Occidentale: HAL |
op_collection_id |
ftunivbrest |
language |
English |
topic |
OHMi Nunavik [SDE]Environmental Sciences |
spellingShingle |
OHMi Nunavik [SDE]Environmental Sciences Bhiry, Najat Rollet, Anne-Julia Decaulne, Armelle HYDECO project - connection-disconnection-reconnection and visibility/invisibility aspects in the Umiujaq watershed |
topic_facet |
OHMi Nunavik [SDE]Environmental Sciences |
description |
National audience Since its establishment at the mouth of the Umiujaq River in 1984, the village of the same name has developed, and notable features of socio-environmental evolution have become apparent. After a characterization of the hydrological system on the basis of photo-interpretation of aerial views and satellite images (via GoogleEarth), environmental changes on the whole watershed appear. First of all, thermokarst processes, which, without being quantitatively evaluated in terms of water and sediment flows, release both mineral suspended matter and organic matter into the surface waters, via a partially underground circulation. Vegetation cover has also changed significantly since 1984, with vegetated area increasing clearly since that date. The filtering role of the vegetation on sediment transfers is likely, limiting the possibilities of direct connection from the slopes on either side of the main bed. However, an example of a landslide, seasonally activated since at least 2013, highlights the potential connection between the slopes and the stream. The summer field season allowed for in situ characterization of the different compartments of the watershed, and qualification of the stream bottom in the downstream segment. The question arises, however, whether the stream has the competence for bottom transport, or whether it flows over inheritances. Depuis la sédentarisation de la population à l’embouchure de la rivière d’Umiujaq, dans le village du même nom qui s’est développé depuis 1984, des traits notoires d’évolution socio-environnementaux sont apparus clairement. Après une caractérisation du système hydrologique sur la base de photo-interprétation de vues aériennes et images satellitaires (via GoogleEarth), des changements environnementaux sur l’ensemble du bassin-versant apparaissent. Il s’agit d’abord de processus thermokarstiques qui, sans que cela soit encore quantitativement évalué en termes de flux hydrique et sédimentaire, relâchent à la fois des matières en suspension et de la matière ... |
author2 |
Université Laval Québec (ULaval) Université de Rennes 2 (UR2) Littoral, Environnement, Télédétection, Géomatique (LETG - Rennes ) Université de Brest (UBO)-Université de Rennes 2 (UR2)-Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG) Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (Nantes Univ - IGARUN) Nantes Université - pôle Humanités Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Humanités Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (Nantes Univ - IGARUN) Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ) Littoral, Environnement, Télédétection, Géomatique (LETG - Nantes ) Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG) ANR-11-LABX-0010,DRIIHM / IRDHEI,Dispositif de recherche interdisciplinaire sur les Interactions Hommes-Milieux(2011) |
format |
Conference Object |
author |
Bhiry, Najat Rollet, Anne-Julia Decaulne, Armelle |
author_facet |
Bhiry, Najat Rollet, Anne-Julia Decaulne, Armelle |
author_sort |
Bhiry, Najat |
title |
HYDECO project - connection-disconnection-reconnection and visibility/invisibility aspects in the Umiujaq watershed |
title_short |
HYDECO project - connection-disconnection-reconnection and visibility/invisibility aspects in the Umiujaq watershed |
title_full |
HYDECO project - connection-disconnection-reconnection and visibility/invisibility aspects in the Umiujaq watershed |
title_fullStr |
HYDECO project - connection-disconnection-reconnection and visibility/invisibility aspects in the Umiujaq watershed |
title_full_unstemmed |
HYDECO project - connection-disconnection-reconnection and visibility/invisibility aspects in the Umiujaq watershed |
title_sort |
hydeco project - connection-disconnection-reconnection and visibility/invisibility aspects in the umiujaq watershed |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-04642195 |
op_coverage |
Montréal, Canada |
genre |
Thermokarst Umiujaq Nunavik |
genre_facet |
Thermokarst Umiujaq Nunavik |
op_source |
Séminaire annuel de l’OHMI Nunavik https://hal.science/hal-04642195 Séminaire annuel de l’OHMI Nunavik, Nov 2022, Montréal, Canada |
op_relation |
hal-04642195 https://hal.science/hal-04642195 |
_version_ |
1810483487503810560 |